Answer:
Boiling is a process whereas evaporation is a process in respect to the speed of the process.
1. Write the word equation for the reaction occurring between lead nitrate and sodium chloride. 2. From your answer in 1 write a balance chemical equation showing all state symbols. 3. Then write the ionic equation for the react ion occurring.
Explanation:
Word Equation
Lead Nitrate + Sodium Chloride --> Lead Chloride + Sodium Nitrate
Balanced Chemical Equation
2 NaCl (aq) + Pb(NO3)2 (aq) → PbCl2 (s) + 2 NaNO3 (aq)
Ionic Equation
In an ionic equation, the aqueous species in the reaction are broken up into ions.
2Na⁺ + 2Cl⁻ + Pb²⁺ + 2NO₃⁻ → PbCl2 (s) + 2Na⁺ + 2NO₃⁻
Why do cations and anions form?
How many grams of MgBr2 are needed to create 3.0L of a 4.5M aqueous solution of magnesium bromide?
Answer:
2486 g
Explanation:
First we calculate how many moles of MgBr₂ are required to create such a solution, using the definition of molarity and the given volume and concentration:
Molarity = moles / liters4.5 M = moles / 3.0 Lmoles = 4.5 M * 3.0 L = 13.5 molNow we convert 13.5 moles of MgBr₂ into grams, using its molar mass:
13.5 mol * 184.113 g/mol = 2486 gThe Plimsoll mark is placed on the side of all large commercial ships. After
reading this article and looking at the modern Plimsoll mark, why do you
think there are so many different marks for water at different levels?
What is used to contain an acid spill and what are the characteristics of them?
what do you need to know
What forms of energy might you encounter while strolling along the beach on a clear day?
How do atmospheric updrafts affect clouds?
Answer:
Updrafts characterize a storm's early development, during which warm air rises to the level where condensation begins and precipitation starts to develop. In a mature storm, updrafts are present alongside downdrafts caused by cooling and by falling precipitation.
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Have a great Day : P
1. The chemical formula of caffeine is C8H10N4O2. Determine the percent composition of the molecule.
Show work please
Answer:
we find the mass for each element in one mole by multiplying the number of atoms in one molecule with the atomic mass
mC=8Ac=8*12=96g
mH=10AH=10*1=10g
mN=4AN=4*14=56g
mO=2AO=2*16=32g
by adding the masses together we find the molar mass of the molecule
M=mC+nH+mN+mO=96+10+56+32=194g/mole
we apply the rule of threes to find the percentage of each element
194g..96gC..10gH...56gN....32gO
100g....a...........b...........c.............d
a=(100*96)/194=49.48%C
b=(100*10)/194=5.19%H
c=(100*56)/194=28.85%N
d=(100*32)/194=16.48%O
Explanation:
Equal masses of two substances absorb the same amount of heat. The temperature of a substance A increases twice as much as substance B. Which substance has a higher specific heat capacity?
A. Substance A
B. Substance B
Letter A because the temperature of a substance A increases "Twice as much".
If a gas is cooled from 315K to 231K and the volume is kept constant, what would the final pressure be if the original pressure was 621 mmHg ?
Answer:
455.4 mmHg
Explanation:
To solve this problem we can use Gay Lussac's Law, which describe the temperature and pressure of a gas, at constant volume and composition:
P₁T₂ = P₂T₁In this case:
P₁ = 621 mmHgP₂ = ?T₁ = 315 KT₂ = 231 KWe input the data:
621 mmHg * 231 K = P₂ * 315 KAnd solve for P₂:
P₂ = 455.4 mmHg6. Which of the following is not a characteristic of electromagnetic light waves?
O A. They can be reflected and refracted.
O B. They travel at the same speed through any one material.
O C. They can't travel through a vacuum.
O D. They obey the formula velocity = wavelength x frequency
Answer:
B. They travel at the same speed through any one material.
Explanation:
What is molar mass of CHI3?
Answer:
393.73 g/mol
Explanation:
brainliest? have a wonderful day
why are metals poor choices for coffee mugs?
Answer:
They will stay too hot.
Explanation:
You would burn yourself on the mug and your drink would be too hot to drink.
Where on the pH scale would you find acids? Bases? What is unique about a pH of 7?
Answer:
Demonstrate familiarity with the pH scale ... body (excluding things like stomach acid) measure around 7.2 and 7.6 on the pH scale (a 7 is neutral on the scale). ... The pH of a solution is a measure of its acidity or alkalinity (base). ... Using a pH meter, you find the pH of an unknown solution to be 8.0.
Explanation:
Answer:
7 is neutral, acids are 1-6, bases are 8-14. Pure water has a pH of 7, where as almost everything else is either an acid or a base.
Can y’all please help me this is due tomorrow
Answer:
1,crust
2, mesosphere
3,Inner core
4,Outer core
5, Mantle
On the Periodic Table, which elements are predominantly (mostly) gases with low densities?
Alkali Metals,
Metalloids
Transition Metals
Non-Metals
Which solution will conduct electric current a sugar solution or a salt solution
What is the oxidation number for Mn in the following compound?
Mn(NO₃)₄
why do oxygen and sulfur have similar chemical properties?
I NEED THIS EXPLANATION ASAP PLEASE
Answer:
Oxygen and sulfur have similar chemical properties because both elements have six electrons in their outermost electron shells. Indeed, both oxygen and sulfur form molecules with two hydrogen atoms: water and hydrogen sulfide
Explanation:
What is the difference between hurricanes,typhoons,and tropical cyclones?
the one main difference between a hurricane and a typhoon is the specific location where the storm takes place!!
typhoons and hurricanes can reach sustained winds of an averaging 74 mph.
Two
moin tunetons of carbohydraus
Answer:
Carbohydrates can be divided into two main types: simple and complex. Simple carbohydrates are made up of just one or two sugar units, whereas complex carbohydrates are made up of many sugar units.
Which element would have a larger
atomic radius?
Magnesium (Mg)
Chlorine (CT)
Question 2 of 20
Based on their locations on the periodic table, which two elements would you
expect to form positive ions with a +3 charge?
A. Nitrogen, N.
B. Boron, B
C. Phosphorus, P
D. Aluminum, Al
A
Because Aluminum atoms tend to lose electrons in order to achieve an insert gas configuration. The aluminum atoms need to lose 3 electrons in order to attain the neon configuration , so it forms a trip of positive action
Answer:
Aluminium & Phosphorus (C & D)
Explanation:
Both these elements need to form positive ions with a +3 charge as they need to lose their 3 electrons to form a stable state in their configuration.
Where does uranium, the main source of nuclear power, come from?
a.Uranium is produced by mining deposits of this mineral found in Earth’s crust.
b.Uranium is produced continually from light energy from the Sun.
c.Uranium is produced by the compaction of animal and plant matter in the earth.
d. Uranium is produced by the conversion of precious metals into a new substance.
Answer:
Uranium is produced by mining deposits of this mineral found in earth's crust
What does the root “thermal” mean?
Please Help
I will give you Brainliest
Answer:
If it has to do with heat, it's thermal. ... The Greek word therme, meaning “heat,” is the origin of the adjective thermal. Something that is thermal is hot, retains heat, or has a warming effect.
Explanation:
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In your opinion,what will happen to a person who has sustained injury in the spinal cord?
Answer: I think they get will paralysed and some of the impulses may not be able to get through.
2- How many electrons make an energy level stable (happy) ?
HELP PLEASE I NEED THE BEST RESPONSE.....
Answer:
You need 8 electrons to make a stable energy level. If you have any less, it won't make it "happy" per say, and with more it will make it happier but its probably safer to use the 8!
Explanation:
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How do the ideas of electrolytes and IV fluids relate?
Answer:
Electrolytes, particularly sodium, help the body maintain normal fluid levels in the fluid compartments because the amount of fluid a compartment contains depends on the amount (concentration) of electrolytes in it. If the electrolyte concentration is high, fluid moves into that compartment (a process called osmosis).
Explanation:
Answer:
Electrolytes are minerals in your body that have an electric charge. They are in your blood, urine, tissues, and other body fluids. Electrolytes are important because they help
Balance the amount of water in your body
Balance your body's acid/base (pH) level
Move nutrients into your cells
Move wastes out of your cells
Make sure that your nerves, muscles, the heart, and the brain work the way they should
Sodium, calcium, potassium, chloride, phosphate, and magnesium are all electrolytes. You get them from the foods you eat and the fluids you drink.
The levels of electrolytes in your body can become too low or too high. This can happen when the amount of water in your body changes. The amount of water that you take in should equal the amount you lose. If something upsets this balance, you may have too little water (dehydration) or too much water (overhydration). Some medicines, vomiting, diarrhea, sweating, and liver or kidney problems can all upset your water balance.
Treatment helps you to manage the imbalance. It also involves identifying and treating what caused the imbalance.
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Which tool was used to collect the solid product of the chemical reaction?
the balance
the funnel with the filter paper
the Erlenmeyer flask
the beaker
the watch glass
With this tool, the could be separated from the
Answer: With this tool, the
✔ copper
could be
separated from the
✔ aqueous solution
.
Explanation:
EDU 2021